What entry understeer actually is
On turn-in, grip should move to the front as you brake and steer. If the brake bias is too far forward, the fronts are already busy stopping and have nothing left to turn; if you’re not trail braking, the front never gets the load it needs to bite; if the front is too stiff or the geometry is off, it rolls onto the wrong part of the tyre. The result is a car that points but won’t follow.
The full picture across all phases — see understeer.
How the engineers diagnose it
Entry understeer lives in the braking phase — the engineers look there first:
- Brake bias and trail braking — entry understeer is most often the brakes. Bias too far forward saturates the fronts; carrying a little brake into the corner transfers weight forward and makes the front bite.
- Front platform — a front ARB or springs too stiff stop the front taking load and rolling onto its tyre. Soften the front to let it work on entry.
- Geometry — too little front camber, or the wrong caster, and the front tyre isn’t flat under cornering load on turn-in. Add camber and read the front edge temperatures.
Entry is where the lap is set up — a front that bites lets you brake later and carry speed to the apex. One change, three laps. The general guide is understeer; see also the setup guide.
The levers that cure entry understeer
From the brakes outward — bias and trail braking first, then the front platform and geometry: